#!/usr/bin/env bash
set -uo pipefail

# CASAN Plan-16 SEC-23 (23.13, MT-01) — RBAC tenant boundary at the DATA layer +
# casan-harness tenant-scoped state wiring.
#
# Proves:
#   * a same-tenant authorized action is ALLOWED,
#   * a cross-tenant request is DENIED even when role/project would allow it,
#   * an ORG-ADMIN of tenant A cannot act on tenant B (tenant isolation > org wildcard),
#   * org-admin within its own tenant is still ALLOWED,
#   * with no tenant args the decision is backward compatible,
#   * a casan-harness run under CASAN_TENANT_ID writes telemetry under the tenant
#     partition (tenant-paths.sh is sourced by the harness).
#
# Deterministic; hermetic; no model/network for the RBAC checks.

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/../scripts/bash/casan-paths.sh"
PROJECT_ROOT="$CASAN_APP_ROOT"
S="$CASAN_HARNESS_ROOT/scripts/bash"
RBAC="$S/rbac-check.py"
HARNESS="$S/casan-harness.sh"
WORK="$(mktemp -d)"
trap 'rm -rf "$WORK"' EXIT
export CASAN_TENANT_STATE_ROOT="$WORK/tenants"

PASS=0; FAIL=0
pass() { echo "PASS: $1"; PASS=$((PASS + 1)); }
fail() { echo "FAIL: $1"; FAIL=$((FAIL + 1)); }
rc_of() { set +e; "$@" >/dev/null 2>&1; echo $?; set -e 2>/dev/null || true; }

echo "===== Plan-16 SEC-23 (23.13): RBAC tenant boundary + harness wiring ====="

# --- same-tenant authorized action -> ALLOW ---
[[ "$(rc_of python3 "$RBAC" check --role project-admin --resource settings --action write \
      --role-project P --target-project P --role-tenant alpha --target-tenant alpha)" -eq 0 ]] \
  && pass "same-tenant authorized action ALLOW" || fail "same-tenant action wrongly denied"

# --- cross-tenant -> DENY (data layer, before role grant) ---
rc=$(set +e; python3 "$RBAC" check --role project-admin --resource settings --action write \
  --role-project P --target-project P --role-tenant alpha --target-tenant beta >/dev/null 2>"$WORK/e1"; echo $?)
{ [[ "$rc" -eq 1 ]] && grep -q CROSS_TENANT_DENY "$WORK/e1"; } \
  && pass "cross-tenant DENY at data layer" || fail "cross-tenant not denied (rc=$rc)"

# --- org-admin cannot cross tenant (stronger than the org wildcard) ---
rc=$(set +e; python3 "$RBAC" check --role org-admin --resource settings --action write \
  --role-tenant alpha --target-tenant beta >/dev/null 2>"$WORK/e2"; echo $?)
{ [[ "$rc" -eq 1 ]] && grep -q CROSS_TENANT_DENY "$WORK/e2"; } \
  && pass "org-admin of A cannot act on tenant B" || fail "org-admin crossed tenant (rc=$rc)"

# --- org-admin within its own tenant -> ALLOW ---
[[ "$(rc_of python3 "$RBAC" check --role org-admin --resource settings --action write \
      --role-tenant alpha --target-tenant alpha)" -eq 0 ]] \
  && pass "org-admin within its tenant ALLOW" || fail "org-admin within tenant wrongly denied"

# --- backward compatible with no tenant args ---
[[ "$(rc_of python3 "$RBAC" check --role org-admin --resource settings --action write)" -eq 0 ]] \
  && pass "no tenant args = backward compatible (org-admin ALLOW)" || fail "backward compat broken"

# --- harness wiring: run under a tenant -> telemetry under the tenant partition ---
printf 'a benign requirement line.\n' > "$WORK/in.txt"
CASAN_TENANT_ID=alpha bash "$HARNESS" "$WORK/in.txt" "$WORK/out.txt" act -- bash -c 'echo done' >/dev/null 2>&1 || true
[[ -d "$WORK/tenants/alpha/telemetry/cost" ]] \
  && pass "casan-harness run under tenant scopes telemetry to the tenant partition" \
  || fail "harness did not tenant-scope telemetry (tenant-paths not wired)"

echo ""
echo "===== SEC-23 23.13 SUMMARY: PASS=$PASS FAIL=$FAIL ====="
[[ "$FAIL" -eq 0 ]] || exit 1